Heat-retaining cooker.



F. v. DETWMR.

HEAT RETAINING COOKER. APPLltATlbN HLED FEB.20,.1913.

3 SHEETS-jSHl-IET l.

51, "1f 111'/ 5x J5 1 i i 50 45 Il?"i F. v. DHWILER.y HEAT RETAININGCOOKER.

APPLICATIQN FILED FEB. 20. |913.

Patented Mar. 19, 1918.

u I 3 SHEETS-SHEET 2. D

' f77/M Q@ ggf/02965 Z7 F. V. DETWILEH.

HEAT RETAININGCOOKER.

APPLICATION FILED FEB. 20. 1913.

l,260,2757. Patented Mar. 19, 1918.

3 SHEETS-SHEET 3- UnrrEn STATES 'PATENT onirica.

FOREST V. DETWILER, OF CHICAGO, ILLINOIS.

`HEATRETAINING COOKER.

To all whom t may concern:

Be it known that I, FOREST V. DETWILER, a citizen of the United States,residing ,at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in HeatRetaining Cookcrs,of which the following is a specification.

This invention relates to f improvements in heat retaining, or tirelesscookers as they l fthe invention is to provide an improved vapparatus ofthis class which will be of a are sometimes called, and one of thelobjects sanitary construction and from which the coolring chamber orreceptacle may be readily removed and vas readily replaced without pdismantling the parts.

To the attainment of theseends and the accomplishment of other new anduseful ob a0 "-fcombii'fiation' and arrangement of the several jects aswill appear the invention consists in the]v features. Q f-` novelty inthe construction,

parts hereinafter more fully described and claimed .-aii c l'-shown inthe accompanying drawingsillustra-ting the invention and in which;

`fFfigure l is a perspective view of an improved apparatus of thisclass' constructed in accordance with the principles of this i-nventionand with parts broken away.

Fig; 2 is a vertical sectional View of one .of .the compartments showingthe cooking -chamber or receptacle in section.

' Fig. 3 is a central vertical sectional view 'l of the parts shown inFig. 1. 355l Fig.' 4 is a vertical transverse sectional -viewftalren online 4-4 Fig. 1 showing the doors closed and with parts removed and.parts.broken away.

Fig. 5 is a transverse sectional view of the vessel holding rack foryone of the compartments.

Fig. 6 is a sectional detail' view of a portion of the rack. y v

Fig. 7 is a perspective view of the removable tray or pan provided forthe purpose of catching any water of condensation which vforms inside ofthe apparatus.

Referring more particularly to the drawings and in the lpresentexemplification yof this invention the numeral 10 designates generallyan inclosing casing which may be of any desiredsize and configurationbut is preferably rectangular in cross-section and is supported bysuitable legs or supports' 11.

This casing is divided into two compartments, one of which compartmentsopens Specification of Letters Patent.

Application filed February 20, 1913.

ment registers.

Patented Mar. 19, 1918. seriai No. 749,653.`

size of the opening through the front of the casing and with whichopening the compart- This compartment is provided with a lining 17preferably of metal which forms a top, bottom, rear and side walls, andthe forward extremities of the top, bottom and side walls are shaped toform inwardly projecting portions 18 arranged adjacent the opening inthe coinpartment.

A frame 19 also constructed of sheet material is arranged within theopening inthe front of the compartment and is'adapted to fill the spacebetween the edge of the lining 18 and the front wall of the casing andalso operates to form a jam or abutment for the closure 12. f

vArranged within thecompartment thusY formed is a food-receptacle orchamber 20 preferably constructed of sheet material and provided with anopen side. This receptacle or chamber 20 is adapted to be inserted andwithdrawn from the compartment and when inserted the portions of theVreceptacle adjacent the open side will engage and rest against theadjacent faces of the inwardly projecting portions 18, which latterserve to support the front end of the receptacle and to hold it spacedfrom the walls of the compartment. The open end of the receptacle may beprovided with deflected portions 21 which abut the shoulder formed onthe outer side of the offset portions 18.

If desired additional supports 22 may be provided for the-` receptacle20 and these supports 22 are arranged in the space formed between therear wall of the casing and the rear face of the offset portion 18 onthe bottom of the compartment, and are preferably of a height slightlyless than the height of the offset portion. These supports 22 preferablyeXtend to the rear wall of the compartment and are provided withopenings 23 so that they will not interfere Withf sureA 2 6'ispreferably insulated and is lo' cated between the closure 12 andtheouter edge of the receptacle 20. A suitable fastening device 28 maybe provided -for locking the closure 26 When closed.

The receptacle l20 may be provided with handles 29 by means of which itmay be -readily Withdrawn or inserted into the compartment and thereceptacle is also provided vvith brackets 30 on the interior thereofwhich brackets serve as support-s for the heating elements 31 or a rack32 upon which latter a Vessel containing the articles to be cooked maybe placed. In order to permit the heated air to pass out of thereceptacle 20 and into the'space between the Wall of the apparatus andthe Wall of the receptacle, the latter is provided With openings 33.This is particularly advantageous when the heating elements 31 areemployed for baking purposes, as the steam Will be forced or drivenoutvof these openings by the heat from the plates. Without the openings33, baking or roasting can not be performed, as the articles will notbrown on account of the steam or moisture. A tray or pan 33a isremovably arranged Within the casing and in such a position that thecompartment 2O Will restthereon and is of such a si'ze that the Wall 33hthereof will be adjacent the side and rear walls of the compartment.This tray is provided for the purpose of catching and conning any Waterof condensation that may form on the side of the removable receptacleand in the space between the receptacle and the compartment Wall. Thetray preferably 'rests upon the supports 22 and is of a thickness sothat the front edge of the tray Will not project .above the supportingsurface of the portion 18 of the lining 17. If desired the tray may beslightly depressed at its center.

Leading from the compartment to the outside of the casing 10 is a tubeor passage 34 Which has communication with a condenser 35 located on theoutside of the casing, so that any moisture in the heated air,`Will passin to the condenser through a tubular member 34 to be condensed. Thiscondenser 35 is provided with a removable section 36 y adapted to beemptied of any Water of condensation, and is also provided With an openupper extremity adapted to be closed f by a closure 37. When thisclosure 37 is opened the vapor Will pass out of the open v end vof thecondenser but When it is closed lining 40 preferably constructed ofmetal.

The top vof the insulation, that isthe portion adjacent the opening, iscut aWay to form .an enlarged opening, and the top of the casingsurrounding thls opening is recessed as shown in Figs. 1 and 3. A sheetmetal covering 41 is arranged over the re- 4 cessed portion in thel topof the casing so thatl its edges 42 Will overhang the edges of theadjacent Walls of the recessed portion and this sheet material 41extends into the enlarged portion of the chamber as at 43 to lform acovering for the adj acentportion of the insulation.v This coveringprojects over the upper edges of the lining and is offset or deflectedto form aniinwardly projecting annular shoulder 44.

Arranged Within the compartment thus formed is a removable receptacle 45the upperedge of which is shaped tol form a cir'- cumferentialloutwardly projecting flange 46 adapted to rest upon the support orshouldered portion 44. This receptacle 45 is of such a size that whenplaced Within the compartment formed by the lining 40, it will besupported .by the flange 46 above the. bottom of the compartment Whileit Will also be spaced from the Wall of the compartment to form an airspace therebetween, and around the receptacle. The receptacle 45 Aisalso of a size slightly smaller than the opening formed by the shoulder44, so that While being placed intothe compartment, it Will, as it isforced into the compartment, force almost all of the air out of thecompartment through the top thereof, the receptacle 45 together With theflange 46 and the slgpulder-44 coperating With the walls f th partmentto form a closed annular space it' 1nd the receptacle,

Ato prevent the transmission of heat.

flange is seated therein, Water of condensa,-A

tion accum/ulating at this point Will form a Water seall for the'annular space. The closure 13 is pro Iided with an insulated projectingportio 47 adapted to enter the open partment and to project a j end ofthe c short distance into the receptacle 45 to form a closure for thelatter.

The portion 47. is provided With recesses or grooves 47 of any desireddepth, opening through the periphery of said' portion in such a mannerthat they Will be deeper at their extremities adjacent the lower end ofthe portion and gradually decrease in depth as they extend toward thecover 13, until their ends merge into the periphery of the said portion,and are provided for the purpose of allowing any vapor or steam"l toescape into the space around the portion 17 of the closure, and from thespace, into the 4tubular passage-55 leading to the condenser 5G.

Arranged Within .the removable receptacle L15 is a rack comprisingspaced uprights48 the upper and lower extremities of which are connectedby cross portions 49 secured Any -number of heating elements 53 may bearranged upon the supports i9--52 and the supports 52 are removable forthe purpose of accommodating'the rack to vessels of different heights. y

In usethe proper supports are placed in the rack from the open side andthe vessels then placed upon the supports, the heating elements 53 beingalso arranged in position either upon the rack or directly upon thefvessel, or the vessel may be placed-upon one of the heating elements.After the parts are thus assembled the rack may be transported by thehandle 54 and placed into the receptacle 45, after which the closure 13is closed and the heat radiated by the heating elements Will cause thecooking operation to proceed. I

In order to permit the escape of moisture from the receptacle 45 atubular member 55 is provided which has communication with the interiorof the compartment and passes through the Wall of the casing and isconnected With a condenser 56 similar in all respects to the condenser35 on the other side of the apparatus. `When the closure 13 isclosed itenters the recessed portion in the top of the casing so that its upperface will stand flush or substantially flush With the face of theremaining portion of the top of the inclosing casing. With this improvedconstruction it will be manifest that there is provided a casing havinga deep Well or receptacle in one end, While in the other end of thecasing is ar- Iranged an oven having an opening through the side ofthef-lcavsing .l lFurthermore, the cooking receptacles' are not 'only soarranged as to form a space between the outer Walls of the receptacleandthe adjacent walls of the compartment Within which they are located,but these receptacles may be readily removed when desired and as readilyreplaced and when so replaced and the respective closures closed, theheated air will be confined therein.

Arranged beneath the closure' 12 and in close proximity thereto is atrough 57 which may be of any desired size and configuration, and isprovided for the purpose f catching and accumulating any Water ofcondensation which may form on the exterior surface of theclosure 12.This trough 57 is removably supported in any desired or suitable mannerpreferably by means of bayonet slots 58 in one of the Walls of thetrough,l which slots coperate with pins or lugs'59 on the casing.

While in the present exemplification of' this invention the preferredforms of construction are herein shown and described it is to beunderstood that various changes may be made in the details ofconstruction and in the arrangement of the several p'arts, f

. Without departing from the-spirit of this invention.

lVhat is claimed as new is l. In an apparatus ofthe class described, thecombination of a casing having a heat insulated chamber therein providedwith an opening through one Wall of the casing, a closure for suchopening, and an open receptacle independent of and arranged 'on beingdetachably connectedA With the casing beneath the said closure forindependent removal therefrom and adapted to receive the water ofcondensation.

2. In an apparatus of the class described, the combination of a casinghaving an entrance opening, a food receptacle therein, a

closure for the casing, said closure having a portion projectingtherefrom and forming a closure for the receptacle, and avapor outletformed in the said projecting portion and leading from the receptacle.

' forming an outlet for vapor from the receptacle.

4. In an apparatus of the class described, the combination of aninclosing casing having an entrance opening, a food receptacle thereinandinsulated from the Wall thereof,

a closure for the opening in the casing, said the outside of the casing,said receptaclel 30 y cent the opening, and a removable recepclosurehaving a portion'forming a closure forlthe receptacle, one or morechannels formed in the periphery of said portion and forming an outletfor lvapor from the receptacle, the said portion of the'closure beingshaped to form a space between the peripherythereof and the casing, andwith which space lthe said channels communicate, and an outlet leadingfrom the-space to the outside `of the casing. .I

5. An apparatus of the class described embodying in combination aninclosing casing having an entrance opening providedwith. a supportwithin and projecting from the wall of the casing, said support'beingarranged adjacent the opening, and a removable recep'tacle adapted to beplaced' tacle adapted to be placed therein, said receptacle having anoutwardly projecting flange adjacent its opening adapted, to engage andrest upon the support for suspending the receptacle and holding it outof cony tact with the walls of the casing, and whereby water ofcondensation will be trapped from entering the said space.A

7. Anapparatus of the class described including in combination aninclosing casing having an entrance opening, a receptacle adapted to beinserted into and removed from the casing through the opening, saidreceptacle being of a size somewhat less than the casing, means disposedwithin and supported by the casing wall to project across the spacebetween the receptacle and casing walls and a supporting lip on thereceptacle f .adapted to engage and `rest uponvthe said means forsupporting the receptacle out of contact with the walls of the casingand.

whereby water of condensation will be trapped from entering the-saidspace, said lip being spaced some distance from the entrance to the saidopening. i

S. An apparatusyof the class described including in combination aninclosing casing,

a receptacle adapted to be inserted into and means for suspending thereceptacle out of contact with the walls of the casing, and whereby7water of condensation will be trapped `from entering said space, thesaid receptacle operating when inserted into the casing to force agreater portion of the air from the casing. y

-9. An apparatus of theA class kdescribed embodying an outer andan innerreceptacle, the latter being of a size somewhat less than the former to'form a space therebetween, means cooperating with the inner receptacleand entirelyA within the outer receptacle and forming a substantialclosure for such space, whereby water of condensation will be trapped'from entering the said space, the air being forced from the space bythe in sertion of the remqvable. receptacle, said closure embodying aflange formed on the inner receptacle adjacent its entrance opening anda support connected with the outer receptacle, said flange adapted toengage and rest upon the said support for suspending the innerreceptacle and for 'holding it out of contact with the walls of theouter receptacle.

In testimony whereof I have signed my name to this specilication, in thepresence of two subscribing witnesses, on this 17th day of February A.D. 1913.'

FOREST V. DETWILER.

lVitnesses F LoRENoE E. SCHULTZ, FREDERICK V.-JOLE.

